Descriptions of new developments in the areas of facilities, applications, user services, support staff, research, evaluation, and courseware production since the Second Summative Report (1977) are provided, as well as a summative overview of PLATO applications at the University of Delaware. Through the purchase of its own PLATO system, this university has become the first institution to offer comprehensive PLATO services on the east coast. New applications in accounting, anthropology, chemical engineering, honors, mathematics, military science, and security have brought the number of departments using PLATO to a total of 28. The project has also laid the groundwork for the publication of its PLATO materials on the national CDC PLATO network, and lessons have been produced for publication in the areas of agriculture, art, counseling, education, human resources, languages, music, nursing, psychology, and system utilities. Divided into three main sections, the report covers project history and development, departmental applications, and evaluation. A catalog of courseware under development at Delaware is appended. (Author/JEG)